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  3. The traffic lights were red when the motorist moved to them. To the surprise of this passenger the car did not slow down. Sudden

The traffic lights were red when the motorist moved to them. To the surprise of this passenger the car did not slow down. Sudden

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问题     The traffic lights were red when the motorist moved to them. To the surprise of this passenger the car did not slow down. Suddenly the passenger was thrown forward in the car as the driver stopped it at the last minute. The car stopped in time. "Sorry," said the driver, "I didn’t notice the light. I thought it was green until 1 saw that it was the top light which was shining. I am color blind, I can’t see red colors as you can."
    This strange story is quite true. In fact about ten men in every hundred suffer from color blindness in some way, women are luckier-only about one in two hundred is affected like this. Perhaps, after all, it is safer to be driven by a woman!
    Color blindness can be dangerous. For example, when fighting in the woods at night soldiers use lights to signal to each other. A green light may mean "advance" and a red light may mean" Danger! keep back!" You can see what will happen if somebody thinks that red is green !
    Birds and animals which hunt at night can not see colors. As far as we know, bats can not see colors at all--only light and dark shapes. The eyes of some insects are very strange. They have thousands of little "eyes" all joined together. Insects can see ultra-violet rays (紫外线) which are invisible to us, and some of them can even see X-rays. Indeed, scientists know that there are other colors around us which insects can see but we can not.
    One scientist experimented with some ants which normally keep their eggs in the dark. When he put their eggs in the sunlight, the ants quickly dragged them into a dark place. The eggs were then put in different colored rays of light, when the scientist shone an ultra-violet ray on the eggs, then ants quickly dragged them into the red light, thinking that it was dark- ness. Some insects have favourite colors. Mosquitoes like blue but do not like yellow. A red light will not attract insects, but a blue lamp will.
    In a similar way human beings have favourite colors. Blue is often popular because it is the color of the cool sky and sea. Green is a peaceful color which makes us think of wide fields and forests. Yellow is the cheerful color of the sun. On the other hand, red is the Color
of blo, d and fire. It makes some people think of accident, danger and blood. Black is the col- or of night. In the dark we cannot see what is around us, so we are sometimes afraid of the unknown and so not like black as a color. Perhaps that is why it is often the color of sadness. Yet we are lucky. We can see many beautiful colors by day, and we can see shapes but not color at night. One day we may even learn more about the invisible colors around us.
The reason for some ants to keep their eggs in the dark is______.
选项 A、that it is cooler there
B、that they do not like sunlight
C、not mentioned in the passage
D、that they like red light
答案C
解析
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